281
281

Dec 7, 2008
12/08

by
Ofir

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281

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Ofir's TzaaTzuim sessions featuring Hadas.

Topics: Ofir's Tzaatzuim, LowLevels, Noise Problems

Source: http://noiseproblems.blogspot.com/

7,381
7.4K

Apr 12, 2005
04/05

by
Ofir

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recorded into a korg d-16 using vocals,a yamaha S8 synthesizer, drums,guitar and melodica all songs in hebrew

37
37

Oct 11, 2011
10/11

by
Ofir Klemperer; Ofir Klemperer

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37

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this is an extrordinary mixture of different musical impulses. the music of ofir klemperer is dynamic, challenging, impulsive, electric, eclectic, weird and astonishing – always with a strong feeling within and slightly disturbing. this is contemporary shit kicking your ass – you can’t hide. physical! *made in 2008 by ofir klemperer. ofir klemperer wrote the hebrew music compositions, and plays -toy / acoustic / electronic / analog instruments, record, overdub, edit, and mix. seconds \...

Source: http://freemusicarchive.org/music/Ofir_Klemperer/no_13/

50
50

Oct 12, 2011
10/11

by
Ofir Klemperer; Ofir Klemperer

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50

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*made in 2008 by ofir klemperer. ofir klemperer wrote the hebrew music compositions, and plays -toy / acoustic / electronic / analog instruments, record, overdub, edit, and mix. seconds \ days. *all paintings were drawn by Amnon Yuhas.

Source: http://freemusicarchive.org/music/Ofir_Klemperer/no_14/

47
47

Oct 10, 2011
10/11

by
Ofir Klemperer; Ofir Klemperer

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47

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0

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"hey you, come here" is a collection out of the variety of documented music which was found inside the beautiful but threatening to burst head of Ofir Klemperer. six songs in hebrew and one instrumental piece, were chosen to create this album which Ofir claims to be an introduction album. The Tunes are complex and unusual, arrangments are colorful , variety of sounds and textures. Some times the touch is electronic, sometimes acoustic and sometimes something else, and always typical...

Source: http://freemusicarchive.org/music/Ofir_Klemperer/hey_you_come_here/

35
35

Jun 4, 2011
06/11

by
Ofir Klemperer

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35

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0

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0

a piece for an ensemble. Performed by Ensemble62

Topics: Ofir Klemperer, Experimental music, Ensemble Modelo 62

3
3.0

Sep 24, 2013
09/13

by
Ofir David

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3

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0

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0

Let A,B be finite dimensional G-graded algebras over an algebraically closed field K with char(K)=0, where G is an abelian group, and let Id_G(A) be the set of graded identities of A (res. Id_G(B)). We show that if A,B are G-simple then there is a graded embedding of A in B iff Id_G(B) is contained in Id_G(A). We also give a weaker generalization for the case where A is G-semisimple and B is arbitrary.

Source: http://arxiv.org/abs/1112.5492v2

4
4.0

Sep 22, 2013
09/13

by
Aviv Ofir

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4

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0

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0

Transiting planets manifest themselves by a periodic dimming of their host star by a fixed amount. On the other hand, light curves of transiting circumbinary (CB) planets are expected to be neither periodic nor to have a single depth while in transit. These propertied make the popular transit finding algorithm BLS almost ineffective so a modified version of BLS for the identification of CB planets was developed - CB-BLS. We show that using this algorithm it is possible to find CB planets in the...

Source: http://arxiv.org/abs/0805.1116v1

36
36

Mar 7, 2010
03/10

by
ofir gold

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36

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0

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0

5
5.0

Sep 22, 2013
09/13

by
Aviv Ofir

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5

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0

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0

A single point source on the OGLE LMC database shows the characteristics of two superimposed eclipsing binaries (EBs). The two EBs happen to have periods very close to the 3:2 resonance. The telescope's small PSF and the apparent resonance between the two EBs raises the suspicion that this is not chance alignment but rather a compact hierarchical system of two pairs of interacting EBs in 3:2 resonance.

Source: http://arxiv.org/abs/0812.3386v1

19
19

Jul 24, 2013
07/13

by
A. Ofir

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19

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0

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0

Transiting planets manifest themselves by a periodic dimming of their host star by a fixed amount. On the other hand, light curves of transiting circumbinary (CB) planets are expected to be neither periodic nor to have a single depth while in transit, making BLS [Kovacs et al. 2002] almost ineffective. Therefore, a modified version for the identification of CB planets was developed - CB-BLS. We show that using CB-BLS it is possible to find CB planets in the residuals of light curves of...

Source: http://arxiv.org/abs/0807.0527v1

19
19

May 23, 2012
05/12

by
Ofir Klemperer

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19

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0

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0

Ofir Klemperer and The Den Haag All $tar$ on various occasions. Studio Album

Source: http://freemusicarchive.org/music/Ofir_Klemperer/Safe_Place/

13
13

Oct 8, 2014
10/14

by
Katz, Ofir

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13

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0

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This article is from Frontiers in Plant Science, volume 5.AbstractNone

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116777

959
959

Nov 1, 2008
11/08

by
Ofir Klemperer

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959

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0

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0

*made in 2008 by ofir klemperer. ofir klemperer wrote the hebrew music compositions, and plays -toy / acoustic / electronic / analog instruments, record, overdub, edit, and mix. seconds \ days. *all paintings were drawn by Amnon Yuhas.

Topics: Ofir Klemperer, no.14, hpcd059, headphonica

271
271

Feb 27, 2010
02/10

by
Ofir Klemperer

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271

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0

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0

Ofir Klemperer and the Den Haag all stars - "Safe Place"

Topics: Ofir, LowLevels, Noise Problems

1,239
1.2K

Jan 30, 2010
01/10

by
Ofir Klemperer

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1,239

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Ofir Klemperer - no.13 this is an extrordinary mixture of different musical impulses. the music of ofir klemperer is dynamic, challenging, impulsive, electric, eclectic - always with a strong feeling within and lightly disturbing. this is contemporary shit kicking your ass - you can't hide. physical! *made in 2008 by ofir klemperer. ofir klemperer wrote the hebrew music compositions, and plays -toy / acoustic / electronic / analog instruments, record, overdub, edit, and mix. seconds \ days....

Topics: headphonica, hpcd075, ofir klemperer

39
39

Jun 26, 2012
06/12

by
Ofir Klemperer

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39

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0

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0

0
0.0

Nov 14, 2014
11/14

by
Cohen, Ofir; Pupko, Tal

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0

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0

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0

This article is from Molecular Biology and Evolution, volume 27.AbstractMacrogenomic events, in which genes are gained and lost, play a pivotal evolutionary role in microbial evolution. Nevertheless, probabilistic-evolutionary models describing such events and methods for their robust inference are considerably less developed than existing methodologies for analyzing site-specific sequence evolution. Here, we present a novel method for the inference of gains and losses of gene families. First,...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2822287

1
1.0

Nov 4, 2014
11/14

by
Cohen, Ofir; Pupko, Tal

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1

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0

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0

This article is from Genome Biology and Evolution, volume 3.AbstractBacterial evolution is characterized by frequent gain and loss events of gene families. These events can be inferred from phyletic pattern data—a compact representation of gene family repertoire across multiple genomes. The maximum parsimony paradigm is a classical and prevalent approach for the detection of gene family gains and losses mapped on specific branches. We and others have previously developed probabilistic models...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3215202

19
19

Sep 18, 2013
09/13

by
Ofir Pele; Michael Werman

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19

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0

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0

We suggest a new color distance based on two observations. First, perceptual color differences were designed to be used to compare very similar colors. They do not capture human perception for medium and large color differences well. Thresholding was proposed to solve the problem for large color differences, i.e. two totally different colors are always the same distance apart. We show that thresholding alone cannot improve medium color differences. We suggest to alleviate this problem using...

Source: http://arxiv.org/abs/1211.5556v1

7
7.0

Sep 23, 2013
09/13

by
Eli Aljadeff; Ofir David

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7

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0

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0

Let A be an associative algebra over an algebraically closed field F of characteristic zero and let G be a finite abelian group. Regev and Seeman introduced the notion of a regular G-grading on A, namely a grading A= {\Sigma}_{g in G} A_g that satisfies the following two conditions: (1) for every integer n>=1 and every n-tuple (g_1,g_2,...,g_n) in G^n, there are elements, a_i in A_{g_i}, i=1,...,n, such that a_1*a_2*...*a_n != 0. (2) for every g,h in G and for every a_g in A_g,b_h in A_h, we...

Source: http://arxiv.org/abs/1212.0343v2

4
4.0

Sep 18, 2013
09/13

by
Ofir E. Alon; Nimrod Moiseyev; Asher Peres

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4

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0

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0

The momentum operator for a particle in a box is represented by an infinite order Hermitian matrix $P$. Its square $P^2$ is well defined (and diagonal), but its cube $P^3$ is ill defined, because $P P^2\neq P^2 P$. Truncating these matrices to a finite order restores the associative law, but leads to other curious results.

Source: http://arxiv.org/abs/quant-ph/9412007v2

9
9.0

Sep 22, 2013
09/13

by
Stephen P. Weppner; Charlotte Elster; Ofir Garcia

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9

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0

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0

We investigate the use of proton-nucleus elastic scattering experiments using secondary beams of 6He and 8He to determine the physical structure of these nuclei. The sensitivity of these experiments to nuclear structure is examined by using four different nuclear structure models with different spatial features using a full-folding optical potential model. The results show that elastic scattering at intermediate energies (

Source: http://arxiv.org/abs/nucl-th/0001029v1

7
7.0

Sep 18, 2013
09/13

by
Ofir E. Alon; Lorenz S. Cederbaum

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7

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0

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0

For small scattering lengths, cold bosonic atoms form a condensate the density profile of which is smooth. With increasing scattering length, the density {\it gradually} acquires more and more oscillations. Finally, the number of oscillations equals the number of bosons and the system becomes {\it fermionized}. On this pathway from condensation to fermionization intriguing phenomena occur, depending on the shape of the trap. These include macroscopic fragmentation and {\it coexistence} of...

Source: http://arxiv.org/abs/cond-mat/0502187v1

1
1.0

Nov 15, 2014
11/14

by
Davidovich, Ofir; Kimmel, Gad; Shamir, Ron

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1

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0

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0

This article is from BMC Bioinformatics, volume 8.AbstractBackground: Genotype information generated by individual and international efforts carries the promise of revolutionizing disease studies and the association of phenotypes with alleles and haplotypes. Given the enormous amounts of public genotype data, tools for analyzing, interpreting and visualizing these data sets are of critical importance to researchers. In past works we have developed algorithms for genotypes phasing and tag SNP...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1797190

3
3.0

Oct 23, 2014
10/14

by
Har-Noy, Ofir; Amitai, Michal; Carter, Dan

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3

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0

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0

This article is from Annals of Gastroenterology : Quarterly Publication of the Hellenic Society of Gastroenterology, volume 27.AbstractAbstractA 60-year-old woman with a medical history of celiac disease was evaluated due to recurrent episodes of small bowel obstruction. Upper and lower endoscopies were normal. The small bowel pathology consisted of celiac disease, and the anti-endomysial antibody was positive. Dilatation of small bowel loops was demonstrated on abdominal computed tomography....

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3982636

29
29

Sep 18, 2013
09/13

by
Ofir Shalvi; Naftali Sommer; Meir Feder

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29

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0

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0

Motivated by signal processing, we present a new class of channel codes, called signal codes, for continuous-alphabet channels. Signal codes are lattice codes whose encoding is done by convolving an integer information sequence with a fixed filter pattern. Decoding is based on the bidirectional sequential stack decoder, which can be implemented efficiently using the heap data structure. Error analysis and simulation results indicate that signal codes can achieve low error rate at approximately...

Source: http://arxiv.org/abs/0806.4773v1

8
8.0

Oct 23, 2014
10/14

by
Uri, Ofir; Bayley, Ian; Lambert, Simon

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8

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0

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0

This article is from Acta Orthopaedica, volume 85.AbstractBackground and purpose: Glenoid reconstruction and inverted glenoid re-implantation is strongly advocated in revisions of failed reverse shoulder arthroplasty (RSA). Nevertheless, severe glenoid deficiency may preclude glenoid reconstruction and may dictate less favorable solutions, such as conversion to hemiarthropasty or resection arthropasty. The CAD/CAM shoulder (Stanmore Implants, Elstree, UK), a hip arthroplasty-inspired implant,...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3967260

10
10.0

Sep 18, 2013
09/13

by
Naftali Sommer; Meir Feder; Ofir Shalvi

######
10

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0

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0

Low density lattice codes (LDLC) are novel lattice codes that can be decoded efficiently and approach the capacity of the additive white Gaussian noise (AWGN) channel. In LDLC a codeword x is generated directly at the n-dimensional Euclidean space as a linear transformation of a corresponding integer message vector b, i.e., x = Gb, where H, the inverse of G, is restricted to be sparse. The fact that H is sparse is utilized to develop a linear-time iterative decoding scheme which attains, as...

Source: http://arxiv.org/abs/0704.1317v1

5
5.0

Oct 25, 2014
10/14

by
Ben-Assuli, Ofir; Shabtai, Itamar; Leshno, Moshe

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5

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0

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0

This article is from BMC Medical Informatics and Decision Making, volume 13.AbstractBackground: Many medical organizations have invested heavily in electronic health record (EHR) and health information exchange (HIE) information systems (IS) to improve medical decision-making and increase efficiency. Despite the potential interoperability advantages of such IS, physicians do not always immediately consult electronic health information, and this decision may result in decreased level of quality...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3651728

2
2.0

Sep 20, 2013
09/13

by
Ofir E. Alon; Alexej I. Streltsov; Lorenz S. Cederbaum

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2

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0

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0

Cold atoms in optical lattices are described in {\it real space} by multi-orbital mean-field Ans\"atze. In this work we consider four typical systems: (i) spinless identical bosons, (ii) spinor identical bosons (iii), Bose-Bose mixtures, and (iv) Bose-Fermi mixtures and derive in each case the corresponding multi-orbital mean-field energy-functional and working equations. The notions of {\it dressed} Wannier functions and Wannier spinors are introduced and the equations defining them are...

Source: http://arxiv.org/abs/cond-mat/0612170v1

4
4.0

Sep 17, 2013
09/13

by
Alexej I. Streltsov; Ofir E. Alon; Lorenz S. Cederbaum

######
4

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0

######
0

Dynamics of attractive ultra-cold bosonic clouds in one dimension are studied by solving the many-particle time-dependent Schr\"odinger equation. The initially coherent wave-packet can dynamically dissociate into two parts when its energy exceeds a threshold value. Noticeably, the time-dependent Gross-Pitaevskii theory applied to the same initial state does not show up the splitting. We call the split object {\it fragmenton}. It possesses remarkable properties: (1) it is two-fold...

Source: http://arxiv.org/abs/0711.2778v1

6
6.0

Sep 22, 2013
09/13

by
Ofir E. Alon; Alexej I. Streltsov; Lorenz S. Cederbaum

######
6

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0

######
0

We derive a multiconfigurational time-dependent Hartree theory for systems with particle conversion. In such systems particles of one kind can convert to another kind and the total number of particles varies in time. The theory thus extends the scope of the available and successful multiconfigurational time-dependent Hartree methods -- which were solely formulated for and applied to systems with a fixed number of particles -- to new physical systems and problems. As a guiding example we treat...

Source: http://arxiv.org/abs/0811.3853v1

23
23

Jul 20, 2013
07/13

by
Ofir E. Alon; Alexej I. Streltsov; Lorenz S. Cederbaum

######
23

######
0

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0

Any {\it exact} eigenstate with a definite momentum of a many-body Hamiltonian can be written as an integral over a {\it symmetry-broken} function $\Phi$. For two particles, we solve the problem {\it exactly} for all energy levels and any inter-particle interaction. Especially for the ground-state, $\Phi$ is given by the simple Hartree-Fock/Hartree ansatz for fermions/bosons. Implications for several and many particles as well as a numerical example are provided.

Source: http://arxiv.org/abs/quant-ph/0406095v1

11
11

Sep 18, 2013
09/13

by
Lorenz S. Cederbaum; Alexej I. Streltsov; Ofir E. Alon

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11

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0

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0

It is well known that attractive condensates do not posses a stable ground state in three dimensions. The widely used Gross-Pitaevskii theory predicts the existence of metastable states up to some critical number $N_{\mathrm{cr}}^{\mathrm{GP}}$ of atoms. It is demonstrated here that fragmented metastable states exist for atom numbers well above $N_{\mathrm{cr}}^{\mathrm{GP}}$. The fragments are strongly overlapping in space. The results are obtained and analyzed analytically as well as...

Source: http://arxiv.org/abs/0705.1802v1

1
1.0

Nov 11, 2014
11/14

by
Tal, Ofir; Haim, Abraham; Harel, Orna; Gerchman, Yoram

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1

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0

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0

This article is from Journal of Experimental Botany, volume 62.AbstractThe presence and role of melatonin in plants are still under debate owing to difficulties of identification and quantification. Accordingly, although it has been frequently proposed that melatonin acts as an antioxidant in phototrophic organisms, experimental data on its physiological role are scarce. This study describes the use of a rapid and simple new method for quantification of melatonin in the marine macroalga Ulva...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3060675

0
0.0

Nov 14, 2014
11/14

by
Goldenberg, Ofir; Erez, Elana; Nimrod, Guy; Ben-Tal, Nir

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0

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0

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0

This article is from Nucleic Acids Research, volume 37.AbstractConSurf-DB is a repository for evolutionary conservation analysis of the proteins of known structures in the Protein Data Bank (PDB). Sequence homologues of each of the PDB entries were collected and aligned using standard methods. The evolutionary conservation of each amino acid position in the alignment was calculated using the Rate4Site algorithm, implemented in the ConSurf web server. The algorithm takes into account the...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2686473

10
10.0

Sep 20, 2013
09/13

by
Alexej I. Streltsov; Ofir E. Alon; Lorenz S. Cederbaum

######
10

######
0

######
0

An essentially-exact approach to compute the wavefunction in the time-dependent many-boson Schr\"odinger equation is derived and employed to study accurately the process of splitting a trapped condensate when ramping-up a barrier such that a double-well is formed. We follow the role played by many-body excited states during the splitting process. Among others, a 'counter-intuitive' regime is found in which the evolution of the condensate when the barrier is ramped-up sufficiently slow {\it...

Source: http://arxiv.org/abs/cond-mat/0612616v2

2
2.0

Oct 30, 2014
10/14

by
Cohen, Ofir; Ashkenazy, Haim; Burstein, David; Pupko, Tal

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2

######
0

######
0

This article is from Bioinformatics, volume 28.AbstractMotivation: Correlated events of gains and losses enable inference of co-evolution relations. The reconstruction of the co-evolutionary interactions network in prokaryotic species may elucidate functional associations among genes.Results: We developed a novel probabilistic methodology for the detection of co-evolutionary interactions between pairs of genes. Using this method we inferred the co-evolutionary network among 4593 Clusters of...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3436823

15
15

Sep 18, 2013
09/13

by
Ofir E. Alon; Alexej I. Streltsov; Lorenz S. Cederbaum

######
15

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0

######
0

Mixtures of cold bosonic atoms in optical lattices undergo phase separations on different length scales with increasing inter-species repulsion. As a general rule, the stronger the intra-species interactions, the shorter is this length scale. The wealth of phenomena is documented by illustrative examples on both superfluids and Mott-insulators.

Source: http://arxiv.org/abs/cond-mat/0605140v1

8
8.0

Sep 23, 2013
09/13

by
Alexej I. Streltsov; Ofir. E. Alon; Lorenz S. Cederbaum

######
8

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0

######
0

Experiments on ultra-cold attractive Bose-Einstein Condensates (BECs) have demonstrated that at low dimensions atomic clouds can form localized objects, propagating for long times without significant changes in their shapes and attributed to bright matter-wave solitons, which are coherent objects. We consider the dynamics of bright soliton trains from the perspective of many-boson physics. The fate of matter-wave soliton trains is actually to quickly loose their coherence and become...

Source: http://arxiv.org/abs/1012.0334v1

7
7.0

Sep 22, 2013
09/13

by
Alexej I. Streltsov; Ofir E. Alon; Lorenz S. Cederbaum

######
7

######
0

######
0

Dynamical Schr\"odinger cats can be formed when a one-dimensional attractive Bose-gas cloud is scattered off a potential barrier. Once formed, these objects are stable in time. The phenomenon and its mechanism -- transformation of kinetic energy to internal energy of the scattered atomic cloud -- are obtained by solving the time-dependent many-boson Schr\"odinger equation. Implications are discussed.

Source: http://arxiv.org/abs/0812.3573v1

3
3.0

Sep 24, 2013
09/13

by
Ofir E. Alon; Alexej I. Streltsov; Lorenz S. Cederbaum

######
3

######
0

######
0

Quantum phases and phase transitions of weakly- to strongly-interacting bosonic atoms in deep to shallow optical lattices are described by a {\it single multi-orbital mean-field approach in real space}. For weakly-interacting bosons in 1D, the critical value of the superfluid to Mott insulator (MI) transition found is in excellent agreement with {\it many-body} treatments of the Bose-Hubbard model. For strongly-interacting bosons, (i) additional MI phases appear, for which two (or more) atoms...

Source: http://arxiv.org/abs/cond-mat/0412734v1

10
10.0

Sep 23, 2013
09/13

by
Lorenz S. Cederbaum; Ofir E. Alon; Alexej I. Streltsov

######
10

######
0

######
0

A coupled-cluster approach for systems of $N$ bosons in external traps is developed. In the coupled-cluster approach the exact many-body wavefunction is obtained by applying an exponential operator $\exp{T}$ to the ground configuration $|\phi_0>$. The natural ground configuration for bosons is, of course, when all reside in a single orbital. Because of this simple structure of $|\phi_0>$, the appearance of excitation operators $T=\sum_{n=1}^N T_n$ for bosons is much simpler than for...

Source: http://arxiv.org/abs/cond-mat/0511430v1

14
14

Sep 19, 2013
09/13

by
Alexej I. Streltsov; Ofir E. Alon; Lorenz S. Cederbaum

######
14

######
0

######
0

In this paper we provide a novel and general way to construct the result of the action of any bosonic or fermionic operator represented in second quantized form on a state vector, without resorting to the matrix representation of operators and even to its elements. The new approach is based on our proposal to compactly enumerate the configurations (i.e., determinants for fermions, permanents for bosons) which are the elements of the state vector. This extremely simplifies the calculation of the...

Source: http://arxiv.org/abs/0910.2577v1

6
6.0

Sep 21, 2013
09/13

by
A. Ofir; H. J. Deeg; C. H. S. Lacy

######
6

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0

######
0

Aims. We search for transiting circumbinary (CB) planets around eclipsing binaries (EBs). Methods. CB-BLS is a recently-introduced algorithm for the detection of transiting CB planets around EBs.We describe progress in search sensitivity, generality and capability of CB-BLS, and detection tests of CB-BLS on simulated data. We also describe an analytical approach for the determination of CB-BLS detection limits, and a method for the correct detrending of intrinsically-variable stars. Results. We...

Source: http://arxiv.org/abs/0905.3400v1

11
11

Sep 19, 2013
09/13

by
Ofir E. Alon; Alexej I. Streltsov; Lorenz S. Cederbaum

######
11

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0

######
0

The evolution of Bose-Einstein condensates is amply described by the time-dependent Gross-Pitaevskii mean-field theory which assumes all bosons to reside in a single time-dependent one-particle state throughout the propagation process. In this work, we go beyond mean-field and develop an essentially-exact many-body theory for the propagation of the time-dependent Schr\"odinger equation of $N$ interacting identical bosons. In our theory, the time-dependent many-boson wavefunction is written...

Source: http://arxiv.org/abs/cond-mat/0703237v1

8
8.0

Sep 22, 2013
09/13

by
Alexej I. Streltsov; Ofir E. Alon; Lorenz S. Cederbaum

######
8

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0

######
0

In this work we develop a complete variational many-body theory for a system of $N$ trapped bosons interacting via a general two-body potential. In this theory both the many-body basis functions {\em and} the respective expansion coefficients are treated as variational parameters. The optimal variational parameters are obtained {\em self-consistently} by solving a coupled system of non-eigenvalue -- generally integro-differential -- equations to get the one-particle functions and by...

Source: http://arxiv.org/abs/cond-mat/0603212v1

5
5.0

Sep 20, 2013
09/13

by
Kaspar Sakmann; Alexej I. Streltsov; Ofir E. Alon; Lorenz S. Cederbaum

######
5

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0

######
0

The first- and second-order correlation functions of trapped, interacting Bose-Einstein condensates are investigated numerically on a many-body level from first principles. Correlations in real space and momentum space are treated. The coherence properties are analyzed. The results are obtained by solving the many-body Schr\"odinger equation. It is shown in an example how many-body effects can be induced by the trap geometry. A generic fragmentation scenario of a condensate is considered....

Source: http://arxiv.org/abs/0802.3417v1

5
5.0

Sep 22, 2013
09/13

by
Marios C. Tsatsos; Alexej I. Streltsov; Ofir E. Alon; Lorenz S. Cederbaum

######
5

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0

######
0

A three dimensional attractive Bose-Einstein Condensate (BEC) is expected to collapse, when the number of the particles $N$ in the ground state or the interaction strength $\lambda_0$ exceeds a critical value. We study systems of different particle numbers and interaction strength and find that even if the overall ground state is collapsed there is a plethora of fragmented excited states that are still in the metastable region. Utilizing the \emph{configuration interaction} expansion we...

Source: http://arxiv.org/abs/1004.3954v2